Discover the best natural fertilizers for indoor plants and learn how to make your own at home. From organic options like Espoma Organic Indoor Houseplant Food to DIY recipes using banana peels and coffee grounds, find out how to nourish your indoor greenery naturally and sustainably.


Welcome to the world of DIY projects for indoor plants! If you love gardening and want to provide natural nourishment to your indoor plants, this article is for you. We’ll explore a variety of natural fertilizers that you can easily make at home to promote the health and growth of your indoor greenery. Join us as we delve into the world of all-natural plant nourishment.

So, what are natural fertilizers for indoor plants, and why should you consider using them? Natural fertilizers are derived from organic sources such as animal manure, compost, bone meal, fish emulsion, and seaweed extracts. These alternatives to synthetic or chemical fertilizers are considered more environmentally friendly and provide a rich source of nutrients for plants. Using natural fertilizers can help create a healthier and more sustainable indoor gardening environment.

Organic Fertilizers for Indoor Plants

When it comes to natural fertilizers, organic options are a popular choice among indoor gardeners. Organic fertilizers are made with all-natural ingredients and have better long-term effects compared to synthetic fertilizers. They are also safer to use around people and pets, as they do not contain harmful chemicals or toxins. Let’s take a look at some organic options for fertilizers:

  1. Espoma Organic Indoor Houseplant Food: This fertilizer is considered the best overall natural fertilizer for indoor plants. It has an NPK ratio of 2-2-2, which indicates the ratio of nitrogen, phosphorus, and potassium in the fertilizer. It is made with natural ingredients and is suitable for organic gardening. Espoma Organic Indoor Houseplant Food is known to be effective in promoting healthy growth in houseplants. [^1]

  2. Neptune’s Harvest Fish-Seaweed Blend Fertilizer: This fertilizer is certified organic and has an NPK ratio of 2-3-1. It contains fish and seaweed sourced from the North Atlantic. It is specifically recommended for houseplants that require a high phosphorus content, such as flowering plants. [^1]

  3. Dr. Earth Organic Life All Purpose Fertilizer: This natural fertilizer is suitable for herbs and edible plants. It has an NPK ratio of 4-6-5, indicating a higher concentration of nitrogen and potassium compared to phosphorus. It is made with a complex formulation of natural ingredients and beneficial microbes. [^1]

Homemade Natural Fertilizers for Indoor Plants

If you prefer a more hands-on approach, you can also make your own natural fertilizers for indoor plants using common household items. Here are some simple and inexpensive homemade fertilizer options:

  1. Banana Peel Fertilizer: Don’t throw away those banana peels! Rich in potassium, nitrogen, magnesium, and phosphorus, banana peels can be an excellent source of nutrients for your indoor plants. Simply cut the peels into small pieces and bury them in the soil around your plants or make a banana tea by soaking the peels in water for a couple of weeks and using the nutrient-rich water to water your plants. [^11]

  2. Eggshell Fertilizer: Instead of discarding eggshells, crush them into a fine powder and mix them with the soil. Eggshells contain calcium, phosphorus, zinc, nitrogen, and other minerals that can benefit your indoor plants. You can also soak the crushed eggshells in boiled water overnight and use the water as a liquid fertilizer. [^15]

  3. Coffee Ground Fertilizer: Used coffee grounds are an excellent source of nitrogen, calcium, potassium, and magnesium. Spread the coffee grounds around the base of your plants or mix them with water and let them steep for a few hours or overnight to create a coffee-infused water that can be used as a liquid fertilizer. [^15]

  4. Epsom Salt Fertilizer: Epsom salt contains magnesium and sulfate, which can be beneficial to plants. Dissolve 1 tablespoon of Epsom salt in a gallon of water and use the solution to water your indoor plants. This homemade fertilizer can help promote healthy growth and vibrant foliage. [^15]

  5. Fish Tank Water Fertilizer: If you have a fish tank, don’t discard the water when cleaning it. The water from a fish tank is rich in potassium and nitrogen from fish waste, making it an excellent natural fertilizer for your indoor plants. Simply use the fish tank water to water your plants, providing them with essential nutrients. [^15]

Considerations for Natural Fertilizers

When using natural fertilizers for indoor plants, it’s important to consider the specific needs of each plant species. Different plants have varying nutrient requirements, and over-fertilization can be harmful. Some indoor plants may benefit from a slow-release organic granular fertilizer, while others may require a liquid organic fertilizer applied during the growing season. Follow the instructions provided by the manufacturer of the natural fertilizer product for proper application and dosage. Regularly monitor the plants and adjust fertilization as needed.

It’s also essential to understand the N-P-K ratio (nitrogen, phosphorus, and potassium) when using natural fertilizers. These three nutrients are crucial for plant growth, with nitrogen promoting foliage growth, phosphorus maintaining healthy root systems and promoting flower production, and potassium increasing plant hardiness and disease resistance. [^5] Ensure that you choose a natural fertilizer that provides the appropriate balance of these nutrients based on the needs of your indoor plants.


In conclusion, natural fertilizers for indoor plants offer a sustainable and eco-friendly way to nourish your green companions. Organic fertilizers such as Espoma Organic Indoor Houseplant Food, Neptune’s Harvest Fish-Seaweed Blend Fertilizer, and Dr. Earth Organic Life All Purpose Fertilizer are excellent choices for those who prefer store-bought options. However, if you enjoy hands-on DIY projects, you can create homemade natural fertilizers using everyday household items like banana peels, eggshells, coffee grounds, Epsom salt, and fish tank water. By incorporating natural fertilizers into your indoor gardening routine, you can provide your plants with the nutrients they need for healthy growth without relying on synthetic chemicals.

Remember to consider the specific needs of your indoor plants and monitor their growth closely. Adjust the application and dosage of natural fertilizers as needed to ensure optimal health and vitality. Happy gardening!


[^1] ‘The 11 Best Fertilizers for Indoor Plants of 2023 to Help Your Greenery Thrive’:

[^5] ‘The 13 Very Best Houseplant Fertilizers’:

[^11] ‘7 Practical Homemade Fertilizer Recipes You Can Make For Free’:

[^15] ‘Make a Simple Organic Fertilizer for Healthy Indoor Plants – Garden Therapy’:

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